Pulp-engine.



Patented Oct. 3, |899.

S. S. STEVENS.

PULP ENGINE.

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No. 634,039.' Patented uct. 3,1899.

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PULP ENGINE.

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PATENT Frison.

SAMUEL S. STEVENS, OF HOOSICK, NEW YORK.

PULP-ENGINE.

SPECIFICATION forming part of Letters Patent No. 634,039, dateaoctober e, 1899.

Application iiled February 9| 18.98.Y Serial No. 66 9,630. (No modelf T0 all whom it may concern.'

Be it known that I, SAMUELV S. STEVENS, a citizen of the United States, residing at North Hoosick, county of Rensselaer', and State of New York,have invented certain new and useful Improvements in Pulp-Engines, of which the following is a specification.

The invention relates to such improvements; and it consists of the novel construction and combination of parts hereinafterdescribed and subsequently claimed.'

Reference may be had to the accompanying drawings and the letters of reference marked thereon, which form a part of this specification.

Similar letters refer to similar parts in the several figures. v

Figure l of the drawings is a plan view ot my improved engine. Fig. 2 is aview of the same in side elevation with the side wall broken away at the middle and at one end. Fig. 3 is a vertical cross-section taken on the broken line 3 .3 ingFig. l. side elevation of the bed-plate box and contents, the vertical side walls of the box being removed. Fig. 5 is a top plan view of the parts shown in Fig. 4. Fig. G is a vertical cross-section taken on the broken line 6 6 in Figs. 4 and 5. worm-sleeve detached. Fig.y 8 is asimilar view of a clutch-section detached. Fig. 9 is a vertical cross-section taken onl the broken line 9 9 in Fig. 5.

Ais the miXing-vat,which is divided by the two parallel midfellows A into circulatingchannels. The middle or return channel A2 connects with and is common tothe two side or roll channels A3, each one of which contains a beater-roll A4,'iixed upon the (same shaft A5, having end journals A6 rotary in bearings A", fixed in cross-beams supported` by the uprights AS. `Rotary movements can be communicated to the shaft and rolls by means of the belt-pulley A, fixed upon the shaft. to form a back-fall on that side of each roll from which the pulp flows and a descending incline on the opposite side in the usual manner. Beneath each roll,in a recess in the bed, is located a detachable box B, containing the bed-plate B', provided'with the usual bedplate knives B2.

Fig. et is a view in f Fig. 7 is aplan view of. the

The bed of the vat is inclined, so as The principal objects of my invention are to facilitate the mixing in a pulp beating and mixing engine and` to level and adjust the bed-plate' relatively to its coperating-roll,

whether the engine is in operation or at rest.

My invention consists of an inclined bottom in the return-channel extending approximately from the back to the front of the vat, with elevated connecting-channels between the roll and return channels, and of lifting screw supports for the adjustable bed-plates, 'with eXterioriy-accessible means forA operating the screws, as hereinafter more fully explained and claimed.

Wfh'en a stratifying apparatus is applied to a pulp-engine, the stratifying-channels, being superposed one above the other, necessitate raising one of them above .the normal bed or bottom ofthe vat. l have ascertained that by raising both of them and inclining the bottom of the returnlchannel from the raised channels to the front of the vat the flow of the stock will be greatly facilitated.

Referring to Fig. 3 ot the drawings, C is the elevated bed of the upper channel lead- ,ing from one of the beater-rolls, and C' is the elevated bed of the lower channel, which leads from the other roll beneath the upper channel. y y

C2 and C3 are respectively the upper and lower discharge-openings, through whichrthe two divisive currents enter the return-channel in horizontal strata, one above the other. It will be seen that the lower bed C is raised above the normalbottoln C5 of the vat, and l give the bottom GG of the return-channel an "incline extending from the bed C tothe normal bed of the vat at its front end, as indicated by the dotted line G5 in Fig. 2. My improved means for leveling and adj ustin g the bed-plate and comprising the plate B and knives B2, which cooperate with the beater-roll, consist of the screws B3 and B4, which are secured by bolts B5 to the bottom of the plate. Each screw is provided with a nut B6, bearing upon a plate or platering B7, secured to the bed of the vat. The nuts are provided with a worm-gear B8, engaged by a worm. The gear on screw B4 is vengaged! by worm D on the shaft D', andthe gear on the otherg'screw B3 is engaged by the worm D2 on the' sleeve D3. The shaft passes entirely IDO through the sleeve and is adapted to turn in ihelattcr. rlhe sleeve and shaft together tu rn in lthe bearing-blocks D1. The projecting end of the shaft (seen at the left-hand end in Fig. 4) is provided with afeather or spline S, Fig. 9, and supports the clutch-section D5, interlockable with the other section D, fixed upon the sleeve. I have shown the extreme end of the shaft screw-threaded and provided with a small lock-nut D7, by which the clutch can be locked in engagement, as shown in Figs. et and 5. The sleeve is also provided with a wormgear D8, engaged by the worm D, liXed upon the upwardly-projecting worm -shaft D10, supported in suitable bearings D12 on the outer side of the vat and provided with an operating-handle D13. n

The operation of the adjusting mechanism is as follows: To raise or lower both ends of the knife-bed plate equally, turn the handwheel D13 in the required direction. To raise or lower one end of the plate relatively to the other, disengage the clutch connection between the shaft and sleeve and bring the two ends tothe desired levels relatively toeach other by the handewheel, which will operate the sleeve to raise or lower one end relatively to the other until the desired relative position is obtained, then rengage the clutch connection and by means of the hand-wheel raise or lower both ends to the desired level.

Vhat I claim as new, and desire to secure by Letters Patent, is

1. In apulp beating and mixing enginehaving apair of roll-channels and an intermediate retain-channel, the combination with beatingand current-producing mechanism located in the roll-channels; of elevated channels for carrying the moving stoel; from the roll-channels to the return-channel; and an inclinedbottom for the return-channel descending in the direction of the moving stock approximately from one end of the vat to the other, substantially as described.

2. In a pulp-engine, the combination with a heating-roll; ofa bed-plate movable to and from the roll; 'a pair ofplate-supporting screws, each provided with a worm-gear; a horizontal worm-shaf t engageable with the worm-gear on the screws; a worm-gear Xed on the Worm-shaft; an upwardly-projecting worm-'shaft engageable with the gear on the horizontal shaft; and means for turning the upwardly-projecting shaft, substantially as described.

3. In a pulp-engine, the combinationv with a beating-roll; and bed-plate movable to and from the roll; of plate-leveling mechanism consisting of a pair of plate-supporting screws, each provided with a worm-gear; a worinshaft engageable with the gear on one of the screws; a worm-sleeve engageable with the gear on the other screw; andrevolubly sup ported on the worm-shaft; 'a clutch splined on the Worm-shaft and detachably enagageable with the worm-sleeVeg and means for communicating revoluble movements to the sleeve, substantially as described.

In testimony whereof I have hereunto set my hand this 15th day of January,-1898.

S. S. STEVENS.

W'itnesses:

GEO. A. MOSHER, FRANK C. CURTIS. 

